Case Converter

Online Text Case Converter - Support 15+ conversion formats, converting English letters to uppercase or lowercase, or converting English sentences to uppercase with the first letter capitalized. Supports uppercase amount conversion, for programming, document writing, currency conversion, and more.

Basic Text Conversions

• UPPERCASE: Convert all letters to uppercase. Perfect for titles, headings, and emphasis
• lowercase: Convert all letters to lowercase. Ideal for URLs, email addresses, and CSS selectors
• Sentence case: Capitalize the first letter of each sentence. Follows standard writing conventions
• Title Case (APA Style): Following APA academic standards, capitalize major words while keeping minor words lowercase (articles, short prepositions, and conjunctions like a/an/the/and/but/or/for/in/on/at). Perfect for academic paper titles, book titles, and article headlines
• aLtErNaTiNg cAsE: Alternate between uppercase and lowercase characters. Great for creative text and social media

Programming Naming Conventions

• camelCase: First word lowercase, capitalize first letter of subsequent words, e.g., userName. Standard for JavaScript/Java/C# variable names
• PascalCase: Capitalize first letter of all words, e.g., UserName. Used for class names, component names, and type definitions
• snake_case: Words connected by underscores, all lowercase, e.g., user_name. Standard for Python/Ruby variables and database column names
• kebab-case: Words connected by hyphens, all lowercase, e.g., user-name. Used for URLs, CSS class names, and HTML attributes
• dot.case: Words connected by dots, e.g., user.name. Common in configuration files and namespaces
• path/case: Words connected by slashes, e.g., user/name. Used for file paths and API routes
• CONSTANT_CASE: Words connected by underscores, all uppercase, e.g., USER_NAME. Standard for constant definitions and environment variables

Currency Amount Capitalization

• Chinese Amount: Convert Arabic numerals to Chinese uppercase (壹贰叁肆伍陆柒捌玖拾佰仟万亿元整). Compliant with financial and contract standards
• Japanese Amount: Convert to Japanese amount uppercase format (壱弐参). Used in Japanese financial documents
• English Amount: Convert numbers to standard English amount expression, format: SAY + Currency + Amount in Words + ONLY
  • Supported currencies: USD (US Dollar), CNY (Chinese Yuan), GBP (British Pound), EUR (Euro), JPY (Japanese Yen), HKD (Hong Kong Dollar)
  • Three decimal formats: Fraction format (88/100), Cents format (CENTS), Point format (POINT)
  • Example: 888.88 → SAY US DOLLARS EIGHT HUNDRED AND EIGHTY-EIGHT AND EIGHTY-EIGHT 88/100 ONLY

Key Features

✓ Ignore Words Dictionary: Customize words to preserve (like iPhone, iOS, USB, HDMI), maintaining brand names and abbreviations in their specific casing

✓ Preserve Line Breaks: Support multi-line text batch conversion while maintaining original formatting structure

✓ Instant Conversion: No waiting required, click to convert immediately

✓ One-Click Copy: Quickly copy results to clipboard

Ideal for programmers, copywriters, financial professionals, academic writers, and other professionals in their daily work.